Press connection.



C. J. NELSON.

PRESS CONNECTION. I APPLICATION FILED SEPT. 7', 1909.

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CHARLES J. NELSON, OF MAYVJ'OOD, ILLINOIS, ASSIGNOR TO AMERICAN CANCOMPANY, OF NEVT YORK, N. Y., A CQRPOR-ATION OF NEW JERSEY.

PRESS CONNECTION.

Application filed September 7, 1909.

To all whom it may concern:

Be it known that I, CHARLES J. NnLsoN, a citizen of the United States,residing in Maywood, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Press Connections, of which thefollowing is a specification.

My invention relates to improvements in press connections for connectingthe crank sleeve or crank rod of drawing, stamping, punching or otherpresses to the cross head or slide thereof.

Heretofore, with press connections commonly in use, great difliculty isfrequently experienced in loosening the connection between the cranksleeve and cross head, as the heavy blows to which the parts aresubjected tend frequently to so set or jam the parts, that great forcehas to be applied to loosen or start the screw threads.

The object of my invention is to provide a strong, simple and etlicientmeans for practically overcoming the di'tliculties heretoforeexperienced, and by means of which the connection may be easily andquickly loosened.

My invention consists in connection with a press cross-head of anysuitable kind or construction, and a crank rod or sleeve having a splitscrew threaded clamping portion, and a screw threaded connecting shankembraced thereby and connected to the cross head, of a differentialclamp screw extending through the clamping arms or wings of the split orclamping portion of the crank sleeve, one of the clamp arms or wings ofthe clamp sleeve having a removable screw threaded bushing to receivethe smaller portion or member of the differential clamp screw.

My invention also consists in the novel construction of parts anddevices and in the novel combinations of parts and devices herein shownand described.

In the accompanying drawing forming a part of this specification, Figure1 is a front elevation of a press connection embodying my invention.Fig. 2 is a section on line 2'2 of Fig. 1. Fig. 3 is a detail section online 33 of Fig. 2. Fig. 4: is adetail lower end view of the removablebushing which receives the smaller portion of the difierential clampscrew' and Fig. 5 illustrates a modification;

In the drawing, A represents the frame of a press of any suitable kindor construction,

Specification of Letters Patent.

Patented June 20, 1911.

Serial No. 516,546.

B the cross-head, C the crank shaft, D the crank rod or sleeve havingits lower portion D split to serve as a clamp sleeve, and provided withclamp arms or wings (Z (Z to receive a differential clamp screw F bywhich the split lower portion or clamp sleeve 1) of the crank sleeve iscaused to firmly embrace and clamp the connecting shank or sleeve Gr.The connecting shank G is preferably hinged to the cross-head B by ahinge pin 9 which extends through lugs b 011 the cross head. The hingeor joint between the shank G and the cross head may be a ball and socketjoint or plain hinge pin, or any other suitable form of attachment. Theconnecting shank G preferably has a sleeve 9 surrounding it, which isfurnished with a nut g and washer 9 at the upper end, and a head g atthe lower end and upon which sleeve the clamp sleeve D of the cranksleeve D directly acts, the sleeve 9 being externally threaded and theclamp sleeve D being internally threaded.

The differential clamp screw F which extends through the arms or wingscl (Z of the clamp sleeve D has differential screw threads f P, thelarger portion f being threaded directly in the clamp arm or wing d, andthe smaller portion f of the differential screw being threaded in aremovable bushing d having internal screw threads to engage the screwthreads f of the clamp screw, and external screw threads engaging screwthreads in the arm or wing (Z in which the bushing fits. The removablebushing (Z is provided with a slot d at its lower end to receive a screwdriver.

In the modification shown in Fig. 5, the connecting shank G isillustrated as being attached to the cross head by a ball andsocket'joint instead of a plain hinge joint.

I claim 1. In a press connection, the combination with a cross-head, ofa crank sleeve having a split clamp sleeve portion having clamp armsfurnished with screw threads of different pitches, a connecting shankembraced by said clamp sleeve and a differential clamp screw extendingthrough the clamp arm or wings of the clamp sleeve and having externalscrew threads of two different pitches, those of one pitch acting uponone of said clamp arms, and those of the other pitch acting upon theother of said clamp arms, substantially as specified.

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2. In a press connection, the combination with a cross-head, clampsleeve having clamp members, one movable in respect to the other, andfurnished with screw threads of different pitches and connecting shankfitting within the clamp sleeve, of a differential clamp screw havingexternal screw threads of two different pitches, those of one pitchacting upon one of said clamp members and those of the other pitchacting upon the other of said clamp members, substantially as specified.

3. In a press connection, the combination with a cross-head, of a clampsleeve having clamp arms and furnished with screw threads of differentpitches and one movable in respect to the other, a connecting shank, anda differential clamp screw extending through said clamp arms and havingexternal screw threads of two difierent pitches, those of one pitchacting upon one of said clamp arms and those of the other pitch actingupon the other of said clamp arms, substantially as specified.

a. In a press connection, the combination with a cross-head, of a clampsleeve having clamp arms and furnished with screw threads of differentpitches and one movable in respect to the other, a connecting shank, anda differential clamp screw extending through said clamp arms and havingexternal screw threads of two different pitches, those of one pitchacting upon one of said clamp arms and those of the other pitch actingupon the other of said clamp arms, one of said clamp arms having aremovable screw threaded bushing to receive the clamp screw,substantially as specified.

5. In a press connection, the combination with a cross-head, of a clampsleeve having clamp arms and furnished with screw threads of differentpitches and one movable in respect to the other, a connecting shankhaving a surrounding screw threaded sleeve and a differential clampscrew having eX- ternal screw threads of two different pitches, those ofone pitch acting upon one of said clamp arms, and those of the otherpitch acting upon the other of said clamp arms, substantially asspecified.

6. In a press connection, the combination with a cross-head, and a crankrod having an internally screw threaded clamp sleeve furnished withclamp arms and furnished with screw threads of different pitches and onemovable in respect to the other, of a connecting shank having anexternally screw threaded sleeve embraced by said clamp sleeve and adifferential clamp screw eX- tending through the clamp arms of saidclamp sleeve and having external screw threads of two different pitches,those of one pitch acting upon one of said clamp arms and those of theother pitch acting upon the other of said clamp arms, substan tially asspecified.

7. In a press connection, the combination with a cross-head, and a crankrod having an internally screw threaded clamp sleeve furnished withclamp arms and furnished with screw threads of difierent pitches and onemovable in respect to the other, of a con necting shank having anexternally screw threaded sleeve embraced by said clamp sleeve and adifferential clamp screw extending through the clamp arms of said clampsleeve and having external screw threads of two different pitches, thoseof one pitch acting upon one of said clamp arms and those of the otherpitch acting upon the other of said clamp arms, one of said clamp armsof the clamp sleeve having a removable screw threaded bushing,substantially as specified.

CHARLES J. NELSON.

lVitnesses H. M. MUNDAY, PEARL ABRAMS.

Copies of this patent may be obtained for five cents each,

by addressing the Commissioner of Patents,

Washington, D. C.

